TMP
  Zabbix3版本故障总结
  http://blog.51cto.com/11555417/2044672
  Zabbix篇五：配置参数优化
  http://blog.51cto.com/allmrys/2286220
  Zabbix调优PPT
  https://www.cnblogs.com/silenceli/p/3586841.html
  Zabbix 预测触发功能
  https://www.zabbix.com/documentation/3.4/zh/manual/config/triggers/prediction
  MySQL performance tips for Zabbix
  http://zabbixzone.com/zabbix/mysql-performance-tips-for-zabbix/
  Zabbix History and trends
  https://www.zabbix.com/documentation/3.4/manual/config/items/history_and_trends
  Zabbix Requirements database_size
  https://www.zabbix.com/documentation/3.4/manual/installation/requirements#database_size
  NIO单一长连接——dubbo通信模型实现
  https://www.jianshu.com/p/13bef2795c44
  RPC框架几行代码就够了
  https://javatar.iteye.com/blog/1123915
  Dubbo 调优 --- 单个 TCP 长连接
  https://www.cnblogs.com/leonxyzh/articles/7446438.html